parent /child relationship with multiple key columns

3 posts, 0 answers
  1. Steven
    Steven avatar
    9 posts
    Member since:
    Jan 2012

    Posted 26 Mar 2015 Link to this post

    cant seems to get gridview to pay attention to multiple key fields in the relationship hierarchy
    code is like this

    GridViewRelation relation = new GridViewRelation(this.radGridStatement.MasterTemplate);
                relation.ChildTemplate = template;
    relationship requires three key columns
    gridview only uses first one (dealerid)
  2. Mahmoud
    Mahmoud avatar
    10 posts
    Member since:
    Mar 2015

    Posted 29 Mar 2015 in reply to Steven Link to this post

    hi Steven 

    If you mean self-references in radgridview

    You can use this code

            private static DataTable CreateDataSource()
                DataTable dataSource = new DataTable("fileSystem");
                dataSource.Columns.Add("ID", typeof(int));
                dataSource.Columns.Add("ParentID", typeof(int));
                dataSource.Columns.Add("Name", typeof(string));
                dataSource.Columns.Add("Date", typeof(DateTime));
                dataSource.Columns.Add("Type", typeof(string));
                dataSource.Columns.Add("Size", typeof(int));

                dataSource.Rows.Add(1, null, "Program Files", DateTime.Now.AddDays(-100), "Folder", 5120);
                dataSource.Rows.Add(2, 1, "Visual Studio 2010", DateTime.Now.AddDays(-100), "Folder", 3220);
                dataSource.Rows.Add(3, 2, "bin", DateTime.Now.AddDays(-100), "Folder", 3220);
                dataSource.Rows.Add(4, 2, "READEME.txt", DateTime.Now.AddDays(-100), "Text Document", 3);

                dataSource.Rows.Add(5, 1, "Telerik RadControls", DateTime.Now.AddDays(-10), "Folder", 3120);
                dataSource.Rows.Add(6, 5, "Telerik UI for Winforms", DateTime.Now.AddDays(-10), "Folder", 101);
                dataSource.Rows.Add(7, 5, "Telerik UI for Silverlight", DateTime.Now.AddDays(-10), "Folder", 123);
                dataSource.Rows.Add(8, 5, "Telerik UI for WPF", DateTime.Now.AddDays(-10), "Folder", 221);
                dataSource.Rows.Add(9, 5, "Telerik UI for ASP.NET AJAX", DateTime.Now.AddDays(-10), "Folder", 121);

                dataSource.Rows.Add(10, 1, "Microsoft Office 2010", DateTime.Now.AddDays(-120), "Folder", 1230);
                dataSource.Rows.Add(11, 10, "Microsoft Word 2010", DateTime.Now.AddDays(-120), "Folder", 1230);
                dataSource.Rows.Add(12, 10, "Microsoft Excel 2010", DateTime.Now.AddDays(-120), "Folder", 1230);
                dataSource.Rows.Add(13, 10, "Microsoft Powerpoint 2010", DateTime.Now.AddDays(-120), "Folder", 1230);

                dataSource.Rows.Add(14, 1, "Debug Diagnostic Tools v1.0", DateTime.Now.AddDays(-400), "Folder", 2120);
                dataSource.Rows.Add(15, 1, "Designer's 3D Tools", DateTime.Now.AddDays(-500), "Folder", 1120);
                dataSource.Rows.Add(16, 1, "Communication", DateTime.Now.AddDays(-700), "Folder", 120);

                dataSource.Rows.Add(17, null, "My Documents", DateTime.Now.AddDays(-200), "Folder", 1024);
                dataSource.Rows.Add(18, 17, "Salaries.xlsx", DateTime.Now.AddDays(-200), "Excel File", 1);
                dataSource.Rows.Add(19, 17, "RecessionAnalysis.xlsx", DateTime.Now.AddDays(-200), "Excel File", 1);


                dataSource.Rows.Add(33, null, "Boot.ini", DateTime.Now.AddDays(-10), "INI File", 0);

                return dataSource;

            protected override void OnLoad(EventArgs e)
                this.radGridView1.MasterTemplate.AutoSizeColumnsMode = GridViewAutoSizeColumnsMode.Fill;
                this.radGridView1.DataSource = CreateDataSource();
                this.radGridView1.Relations.AddSelfReference(this.radGridView1.MasterTemplate, "ID", "ParentID");

                this.radGridView1.Columns["ID"].IsVisible = false;
                this.radGridView1.Columns["ParentID"].IsVisible = false;
                this.radGridView1.Columns["Size"].FormatString = "{0} MB";


     and You can find this code in Demo Application - Telerik UI for WinForms , In case installed on your computer

  3. Hristo
    Hristo avatar
    1068 posts

    Posted 31 Mar 2015 Link to this post

    Hello guys,

    Mahmoud, thank you for sharing this example with the community. I must add that whether creating a self referencing RadGridView element or a normal hierarchy it is essential that the ParentColumnNames and ChildColumnNames collections be filled with the names of the fields of the corresponding data sources.

    I believe that the following articles will be of help: Binding to Hierarchical Data ProgrammaticallySelf-Referencing Hierarchy. I prepared a demo project which programmatically creates a hierarchy.

    I hope this information was useful. Should you have further questions please do not hesitate to write back.

    Hristo Merdjanov

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